CN103128297B - A kind of production method of metal lead powder - Google Patents
A kind of production method of metal lead powder Download PDFInfo
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- CN103128297B CN103128297B CN201110385504.6A CN201110385504A CN103128297B CN 103128297 B CN103128297 B CN 103128297B CN 201110385504 A CN201110385504 A CN 201110385504A CN 103128297 B CN103128297 B CN 103128297B
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Abstract
A kind of production method of metal lead powder, comprise the step such as metal molten, atomization, the temperature of metal molten process molten lead liquid is controlled at about 425～440 DEG C, in described atomization process, add BTA additive, its addition accounts for 0.001%～0.005% of metallic lead liquid weight after fusing, and the pressure-air throughput that atomization process passes into is controlled at approximately 5～6.5m3/ min. The present invention is by producing in metal lead powder process and select a kind of additive at atomization, utilize the character of additive self, the interaction of additive and metal and the favorable environment of atomization, make additive gasification form the protective layer of the anti-oxidation of one deck and caking on metal lead powder surface; The lead powder product that application the inventive method is produced, adopt conventional packaging metal lead powder product oxidation deterioration rate to be effectively controlled at 0.5%～3.5%, the conventional packaging of employing production cost is reduced effectively, production system security is good, and return of goods rate is reduced greatly, remarkable in economical benefits.
Description
Technical field
The present invention relates to a kind of production method of metal dust, be specifically related to a kind of atomization producer of metal lead powderMethod, belongs to metallurgical technology field.
Background technology
The production of metal current lead powder adopts gas atomization, and its basic production technology is: the first step, metalFusing, fusion temperature than melting point metal high 50 DEG C～100 DEG C; Second step, in atomization plant, utilizesThe pressure-air atomization metal liquid stream of 0.3MP～1.2MP, makes the powder that conforms with dimension, requirement; TheThree steps, cooling collection powder; The 4th step, sieves through cooling powder; The 5th step, product vacuum packaging.
Because the metal lead powder that atomization is produced is at present exposed to oxidizable going bad in air, therefore adopt vacuum packetDress, but there is following problem: 1, vacuum packaging is easy in the product of producing under existing production technology situationThere is various gas leakage situations, cause the oxidation of powder; 2, vacuum packaging is because external and internal pressure is poor, lead powder endBe easy to caking with tin powder; 3, the grain weight of oxidation and caking is newly processed increases a large amount of costs, powder simultaneouslyVolatilization and fly upward, cause metal loss, volatilize and fly upward and also easily cause heavy metal poisoning.
Summary of the invention
The object of the present invention is to provide a kind of production method of metal lead powder, the metal lead powder that the method makes is anti-Oxidation susceptibility is good, be applicable to carrying out routine packaging, avoided the problem of vacuum packaging caking simultaneously; The method techniqueSimply, be easy to control, security is good.
The object of the invention is to be achieved through the following technical solutions:
A production method for metal lead powder, comprises the step such as metal molten, atomization, it is characterized in that: metalThe temperature of fusion process molten lead liquid is controlled at 425～440 DEG C, adds benzo three nitrogen in described atomization processAzoles additive, its addition accounts for 0.001%～0.005% of metallic lead liquid weight after fusing, and atomization process passes intoPressure-air throughput be controlled at 5～6.5m3/ min. The method makes the metal lead powder of 0.1～4mm level,It is applied in the high density rubber slab of anti-nuclear radiation in nuclear engineering field.
Above-mentioned BTA additive, its molecular formula: C6H5N3, outward appearance is white, micro-Huang or micro-redLook acicular crystal, molecular weight 119.0, boiling point: 204 DEG C (pressure 2KPa), and fusing point: 100 DEG C,For commercially available prod.
Inventor adopts the research and development of the 0.1～4mm level metal lead powder of atomization production application in nuclear engineering fieldIn process, selected multiple additives to prevent the oxidation of metal dust product, but or the metal dust making produceProduct adopt the product that oxidation occurs after conventional packaging at least to reach more than 45%, cannot promote, product antioxidant effectUndesirablely do not reach industrial requirement; There is safety issue, the bad control of whole production process.Inventor has done a large amount of experimental studies, has finally selected BTA additive and has added in atomization processAdd, the addition of BTA is also worthy of careful study very much simultaneously, is controlled at amount ranges of the present invention and makes to produceThe security oxidation resistance good, simultaneously final metal dust product of journey is good, and ultimogenitary metal dust producesProduct adopt conventional packaging, and its oxidation deterioration rate is only 3～3.5% left and right.
In order further to improve the oxidation resistance of the metal lead powder product making, above-mentioned BTA additiveThe temperature that adds be that 210-283 DEG C, pressure are 0.8～0.95 standard atmospheric pressure; Can make the metal powder of producingEnd product adopts conventional packaging, and its oxidation deterioration rate is only 2.3～2.8% left and right.
More preferably, in order further to improve the oxidation resistance of security performance and metal lead powder product, above-mentioned benzeneAnd the temperature that adds of triazole additive is 250～275 DEG C, in metal liquid stream atomization process, pass into pressure-airPressure be 0.3～0.5Mpa, the temperature of metal molten process molten lead liquid is controlled at 430～436 DEG C; RawThe metal dust product producing adopts conventional packaging, and its oxidation deterioration rate is only 1.2～2.0% left and right.
Specifically, a kind of production method of metal lead powder, comprises the step such as metal molten, atomization, its featureBe: in described atomization process, add BTA additive, its addition accounts for the molten metal weight after fusing0.002%～0.004% of amount, the temperature that adds of described BTA additive is 250～275 DEG C, pressureBe 0.8～0.95 standard atmospheric pressure, the pressure that passes into pressure-air in metal liquid stream atomization process is 0.3～0.5Mpa, high pressure gas flow are 5～6.5m3/ min, the temperature of metal molten process molten lead liquid is controlled at 430～436 DEG C; In whole production process security of system good, be easy to control, the metal dust product of simultaneously producing is onlyNeed to adopt conventional packaging, its oxidation deterioration rate is only 0.5～1.0% left and right.
The present invention has following beneficial effect:
The present invention, by producing in metal lead powder process and select a kind of additive at atomization, utilizes additive selfCharacter, the interaction of additive and metallic lead and the favorable environment of atomization, gasify at lead additivePowder surface forms the protective layer of the anti-oxidation of one deck and caking; By production practices, application the inventive method is produced0.1～4mm level metal lead powder be mainly used in nuclear engineering field and make the high density rubber slab of anti-nuclear radiation,Adopt conventional packaging, reduced more than 98% because of the return of goods that are oxidized and caking occurs, the oxidation of metal lead powder productDeterioration rate can effectively be controlled at 0.5%～3.5%, and the conventional packaging of employing production cost is reduced effectively, lifeThe security of product system is good, and return of goods rate is reduced greatly, remarkable in economical benefits, and employee's working environment obtains simultaneouslyBe guaranteed to improvement, physical and mental health.
Detailed description of the invention
Below by embodiment, the present invention is specifically described, is necessary to be pointed out that following examples at thisOnly be used to further illustrate the present invention, can not be interpreted as limiting the scope of the invention, this fieldPerson skilled in the art can make some nonessential improvement and tune to the present invention according to the invention described above contentWhole.
Embodiment 1
A production method for metal lead powder, carry out in the steps below:
A. in metal molten stove, dissolve and obtain metallic lead liquid stream, the temperature of molten lead liquid is controlled at 430～436℃；
B. the metallic lead liquid flow diameter adding in atomization process is at 5～5.5mm; By pressure be 0.3～0.5Mpa,Throughput is 6～6.5m3The pressure-air of/min passes in atomization plant metallic lead liquid is flowed to atomization,Pass into BTA additive, described BTA additive addition accounts for and enters atomization simultaneously0.002%～0.004% of the metal liquid stream weight of equipment, the adding of described BTA additiveTemperature is that 264～275 DEG C, pressure are 0.8～0.95 standard atmospheric pressure;
C. be cooled to normal temperature collection powder;
D. screening, through routine be packaged into bag for subsequent use or for sale.
In said method production process, security is good; 0.1～4mm level metal lead powder oxidation deterioration the rate making is only0.5～1.0%, exist and return goods hardly post sales, conventional packaging, remarkable in economical benefits.
Embodiment 2～6: according to the following steps and explained hereafter metal dust, all the other are with embodiment 1.
0.1～4mm level metal lead powder oxidation deterioration rate that said method makes is only 1.2～3%, conventional packaging, economyRemarkable benefit; In preparation process, security is good.
Claims (1)
1. the production method of a metal lead powder, comprise metal molten, atomization steps, it is characterized in that: the temperature of metal molten process molten lead liquid is controlled at 430～436 DEG C, in described atomization process, add BTA additive, its addition accounts for 0.002%～0.004% of metallic lead liquid weight after fusing, the temperature that adds of described BTA additive is 250～275 DEG C, pressure is 0.8～0.95 standard atmospheric pressure, the pressure that passes into pressure-air in metal liquid stream atomization process is 0.3～0.5Mpa, the pressure-air throughput that atomization process passes into is controlled at 5～6.5m3/min。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110385504.6A CN103128297B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metal lead powder |
| CN201610308034.6A CN105728737B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation lead powder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110385504.6A CN103128297B (en) | 2011-11-28 | 2011-11-28 | A kind of production method of metal lead powder |
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| CN201610308034.6A Division CN105728737B (en) | 2011-11-28 | 2011-11-28 | A kind of preparation method of anti-oxidation lead powder |
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| CN103128297A CN103128297A (en) | 2013-06-05 |
| CN103128297B true CN103128297B (en) | 2016-05-18 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103400624B (en) * | 2013-07-13 | 2017-05-24 | 大丰市大奇金属磨料有限公司 | Metal lead ball for shielding radiation and manufacturing method of metal lead ball |
| CN104131317B (en) * | 2014-08-01 | 2016-08-24 | 昆明理工大学 | The method of thin lead powder is prepared in a kind of electro-deposition |
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| JPH11250744A (en) * | 1998-03-02 | 1999-09-17 | Fujikura Ltd | Rustproof processing method for conductor for outdoor distribution line |
| CN1356189A (en) * | 2000-12-02 | 2002-07-03 | 王有林 | Antioxidizing agent for metal powder |
| CN101139716A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for preventing oxidization of copper powder |
| CN101362206A (en) * | 2008-10-09 | 2009-02-11 | 陈新国 | Preparation method of continuous high quality soldering powder |
| CN101736338A (en) * | 2009-11-25 | 2010-06-16 | 中南大学 | Composite antioxidant applied to copper powder |
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2011
- 2011-11-28 CN CN201110385504.6A patent/CN103128297B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11250744A (en) * | 1998-03-02 | 1999-09-17 | Fujikura Ltd | Rustproof processing method for conductor for outdoor distribution line |
| CN1356189A (en) * | 2000-12-02 | 2002-07-03 | 王有林 | Antioxidizing agent for metal powder |
| CN101139716A (en) * | 2007-10-25 | 2008-03-12 | 金川集团有限公司 | Method for preventing oxidization of copper powder |
| CN101362206A (en) * | 2008-10-09 | 2009-02-11 | 陈新国 | Preparation method of continuous high quality soldering powder |
| CN101736338A (en) * | 2009-11-25 | 2010-06-16 | 中南大学 | Composite antioxidant applied to copper powder |
Non-Patent Citations (1)
| Title |
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| 用限制型低压喷嘴制备细金属粉末;Cubra.C，李朝军;《国外锡工业》;19971231(第2期);第49页左栏第1段至右栏第1段，第50页左栏第1段，表1，图5（b） * |
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Inventor after: Chen Lin Inventor after: Ma Caiming Inventor after: Mo Zhengbin Inventor before: Zeng Mingjun Inventor before: Liu Qiang Inventor before: Mo Zhengbin |
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Effective date of registration: 20160413 Address after: 401431 Sanjiang street, Qijiang District, Chongqing Applicant after: Chongqing You Yanchongye novel material company limited Address before: 401431 Sanjiang street, Qijiang, Chongqing Applicant before: Chongqing Smeltted Co., Ltd. |
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